fg_simulate_grain_blk8x8 sse4

fg_simulate_grain_blk8x8_sse4.c

void fg_simulate_grain_blk8x8_sse4(int32_t *grainStripe, uint32_t grainStripeOffsetBlk8,
  uint32_t width, uint8_t log2ScaleFactor, int16_t scaleFactor, uint32_t kOffset, uint32_t lOffset, uint8_t h, uint8_t v, uint32_t xSize)
{
    uint32_t idx_offset_l1, idx_offset_l2, idx_offset_l3, idx_offset_l4;
    uint32_t grainStripeOffsetBlk8_l1, grainStripeOffsetBlk8_l2, grainStripeOffsetBlk8_l3, grainStripeOffsetBlk8_l4;

    uint32_t idx_offset = ( h*NUM_CUT_OFF_FREQ +  v ) * DATA_BASE_SIZE  * DATA_BASE_SIZE;

    __m128i scale = _mm_set_epi32(scaleFactor, scaleFactor, scaleFactor, scaleFactor);

    for (uint32_t l = 0; l < 8; l+=4) {

      idx_offset_l1            = idx_offset + (l + lOffset) * DATA_BASE_SIZE;
      idx_offset_l2            = idx_offset + (l + 1 + lOffset) * DATA_BASE_SIZE;
      idx_offset_l3            = idx_offset + (l + 2 + lOffset) * DATA_BASE_SIZE;
      idx_offset_l4            = idx_offset + (l + 3 + lOffset) * DATA_BASE_SIZE;

      grainStripeOffsetBlk8_l1 = grainStripeOffsetBlk8 + (l*width);
      grainStripeOffsetBlk8_l2 = grainStripeOffsetBlk8 + ((l + 1)*width);
      grainStripeOffsetBlk8_l3 = grainStripeOffsetBlk8 + ((l + 2)*width);
      grainStripeOffsetBlk8_l4 = grainStripeOffsetBlk8 + ((l + 3)*width);

      for (uint32_t k = 0; k < xSize; k+=4) 
      {
        __m128i fg_data_1 = _mm_loadu_si64(fg_data_base + idx_offset_l1 + (k + kOffset));
         __m128i fg_data_1_lo = _mm_cvtepi8_epi32(fg_data_1);
        __m128i chunk_1 = _mm_srai_epi32(_mm_mullo_epi32(fg_data_1_lo, scale), log2ScaleFactor + GRAIN_SCALE);
        _mm_store_si128(&grainStripe[grainStripeOffsetBlk8_l1 + k], chunk_1);

        __m128i fg_data_2 = _mm_loadu_si64(fg_data_base + idx_offset_l2 + (k + kOffset));
        __m128i fg_data_2_lo = _mm_cvtepi8_epi32(fg_data_2);
        __m128i chunk_2 = _mm_srai_epi32(_mm_mullo_epi32(fg_data_2_lo, scale), log2ScaleFactor + GRAIN_SCALE);
        _mm_store_si128(&grainStripe[grainStripeOffsetBlk8_l2 + k], chunk_2);

        __m128i fg_data_3 = _mm_loadu_si64(fg_data_base + idx_offset_l3 + (k + kOffset));
        __m128i fg_data_3_lo = _mm_cvtepi8_epi32(fg_data_3);
        __m128i chunk_3 = _mm_srai_epi32(_mm_mullo_epi32(fg_data_3_lo, scale), log2ScaleFactor + GRAIN_SCALE);
        _mm_store_si128(&grainStripe[grainStripeOffsetBlk8_l3 + k], chunk_3);

        __m128i fg_data_4 = _mm_loadu_si64(fg_data_base + idx_offset_l4 + (k + kOffset));
        __m128i fg_data_4_lo = _mm_cvtepi8_epi32(fg_data_4);
        __m128i chunk_4 = _mm_srai_epi32(_mm_mullo_epi32(fg_data_4_lo, scale), log2ScaleFactor + GRAIN_SCALE);
        _mm_store_si128(&grainStripe[grainStripeOffsetBlk8_l4 + k], chunk_4);
      }

    return;
 }